Is this a realistic tactic?

[cj95]

On my second Career in a Type II after I had a DiD encounter in mid 1940.


I try to stick to my assigned grid just for realisms sake, and usually what I end up doing is creeping along at SLOW dropping down to periscope depth to listen for a few hours, then back up to recharge.

I end up doing this while up and down rollercoaster pattern multiple times unitl I get a contact.

Im wondering is this realistic?

Did U-Boats rely on hydrophones primarily for initial contact, or should I stay on the surface more?

Just wondering.


Also what was the typical torpedo lauch range? I find myself cutting it to the edge with 400-500 yard shots all the time, but wonder if thats too close for reality except in extreme circumstances.